Cooling apparatus



May 20, 1930. J. GRANSTEDT I 1,759,366

COOLING APPARATUS Original Filed June 27, 1928 Patented May 20, 1930 UNITED STATES PATENT ()FFICE COOLING APPARATUS Original application filed June 27, 1928, Serial No. 288,753, and in Sweden March 16, 1928.

this application filed October 11, 1929. Serial No. 398,978.

This invention relates to water cooling systems for motor vehicles and has for its object to provide a radiator cap which may be used both as a filling tube for the radiator and as a condenser to condense the steam generated in the radiator and pass the water of condensation back into the radiator.

The invention is characterized by the fact the said cap comprises a hollow ball or the like having an opening surrounded by a threaded nippleadapted to be screwed into ing at both ends outside said ball, one project" ing end forming an intake funnel, whilst the other projecting end constitutes an outwardly threaded nipple of the same dimensions as the I said first-mentioned nipple.

7 One embodiment of the invention is illustrated in the accompanying drawing which shows avertical section of a radiator cap ac cording to this invention.

WVith reference to the drawing the numeral 1 indicates a hollow ball having an opening at 2 surrounding by a projecting nipple 3 which is threaded outwardly so that it may be screwed into the threaded inlet hole of the radiator of a motor vehicle.

Extending through the ball 1 in a direction at right angles to the direction of the opening 2 is a tube 4 formed integral with the ball 1. The tube 3 projects at both of its ends beyond the periphery of the ball 1. One projecting end of the tube is shaped as a funnel 5, whilst the other projecting end 6 of tube 4 is cylindrical in shape and threaded outwardly. The diameter of the threaded end 6 is equal to that of the nipple 3 so that the end 6 may also be screwed into the inlet hole of the radiator.

WVith the nipple 3 in engagement with said inlet hole the ball 1 with its tube 4 operates as a condenser to condense the steam gener ated in the radiator and pass the water of condensation back into the radiator. The reason for this operation is that atmospheric air is forced through the tubes: during the running of the vehicle and to this end the funnel 5 should be directed forwardly.

After unscrewing of the nipple 3 from the Divided and body having an opening surrounded by a pro- 1 jecting threaded nipple to engage a threaded hole in the radiator, an open-ended tube extending through said body at right angles to the direction of said opening, a projecting threaded nipple of the same dimensions as said first-mentioned nipple provided at one end of said tube, and a projecting funnel provided at the other end of the tube.

2. The herein described attachment for the radiator of an automobile, comprising a ball shaped hollow body having an opening surrounded by a projecting threaded nipple adapted to engage a threaded hole in the ra diator, an open-ended tube formed integral with said ball and extending therethrough at right angles to the direction of said opening, 7

said tube projecting at both ends outside the hollow body, a projecting threaded nipple of the same dimensions as said first-mentioned nipple formed integral with the tube at one end thereof, and a projecting funnel formed iritegral with the tube at the other end there'- 0 In testimony whereof I have signed my name.

J OHAN ANSHELM GRANSTEDT. 

